EP3494002A1

EP3494002A1 - Air-conditioning device for a vehicle, and vehicle having such an air-conditioning device

Info

Publication number: EP3494002A1
Application number: EP17739874.0A
Authority: EP
Inventors: Johannes Klampfl; Arthur SCHMITT
Original assignee: Daimler AG
Current assignee: Mercedes Benz Group AG
Priority date: 2016-08-03
Filing date: 2017-07-14
Publication date: 2019-06-12
Also published as: WO2018024359A1; DE102016009460A1

Abstract

The invention relates to an air-conditioning device (3) for a vehicle (1), with a refrigerant circuit (5) along which a refrigerant can be conveyed, the refrigerant circuit (5) having a compressor (7), a gas cooler (9), an expansion device (11) and an evaporator (13), and with a heat transport medium circuit (15) in which a liquid heat transport medium can be conveyed. According to the invention, the heat transport medium circuit (15) is fluidically and thermally connected to the gas cooler (9) and/or to the evaporator (13) of the refrigerant circuit (5) in such a manner that thermal output of the refrigerant circuit (5) can be conveyed via the heat transport medium circuit (15) to at least one heat transfer device (17).

Description

Air conditioning device for a vehicle and vehicle with such

air conditioning unit

The invention relates to an air conditioning device for a vehicle and a vehicle having such an air conditioning device.

From the German patent application DE 101 61 254 A1 is a

Air conditioning device for a vehicle is known, which has a refrigerant circuit along which a refrigerant is conveyed. The refrigerant circuit is directly fluidically and thermally connected on the one hand with an outdoor heat exchanger and the other with an interior heat exchanger of the vehicle, wherein by means of a valve means a flow of the refrigerant in the refrigerant circuit can be changed, so that on the one hand a heating operation and on the other hand, a cooling operation can be displayed for the vehicle interior , The refrigerant circuit acts in the heating mode as a heat pump and in the cooling mode as air conditioning. Since only the refrigerant circuit is used directly for the air conditioning of the vehicle interior, it requires a complex, comparatively large refrigerant circuit, this - in particular due to the extensive piping - numerous

Must have connection points. This is a leakage risk for the

Refrigerant circuit very high. In addition, a high system pressure of up to 125 bar must be maintained in the large refrigerant circuit, which necessitates the use of expensive components, in particular made of stainless steel. Many of those for such

Refrigerant circuits available components are not suitable for use in vehicles, so here special and / or custom-made. The large refrigerant circuit requires a large refrigerant charge, for example, several kilograms of carbon dioxide in a C0 ₂ -Kältemittelkreislauf. All functions require several solenoid valves and several expansion valves. It requires a valve operating range of up to about 125 bar and 160 ° C. Since that Refrigerant has only a small heat capacity, on / off operations of the air conditioning device for vehicle occupants are directly felt.

The invention has for its object to provide an air conditioning device for a vehicle and a vehicle with such an air conditioning device, said disadvantages do not occur.

The object is achieved by providing the subject matters of the independent claims. Advantageous embodiments will be apparent from the

Dependent claims.

The object is achieved in particular by providing an air conditioning device for a vehicle, in particular for a bus, which provides a

Having refrigerant circuit along which a refrigerant is conveyed. Of the

Refrigerant cycle includes a compressor, a gas cooler, an expansion device and an evaporator. The air conditioning device also has a

Heat transfer medium circuit, along which a liquid heat transport medium is conveyed. It is provided that the heat transfer medium circuit with the gas cooler and / or with the evaporator of the refrigerant circuit is fluidly and thermally connected such that thermal power of the refrigerant circuit via the heat transfer medium circuit to at least one heat transfer device can be conveyed. The air conditioning device has advantages over the prior art. In particular, due to the fluidic and thermal connection of the heat transport medium circuit with the gas cooler and / or the evaporator of the refrigerant circuit, thermal power from the refrigerant circuit can be efficiently conveyed to the heat transfer device via the heat transport medium circuit. If the air conditioning device is used in a vehicle, therefore, no costly installation of refrigerant pipes, but the refrigerant circuit can be constructed relatively small, the transport of thermal power from the refrigerant circuit to heat transfer devices of the vehicle can be done completely on the heat transport medium cycle. This, in turn, can very efficiently remove heat from the gas cooler and / or supply heat to the evaporator. The refrigerant circuit itself can be made very simple and, above all, small. As a result, in particular, it can only have a small number of connection points with a correspondingly reduced leakage risk. The area that must be operated at high system pressure is then also small, with a large part of the air conditioning device can include the heat transfer medium circuit and thus based on the liquid heat transport medium, which is handled with significantly lower risk than the refrigerant. Vehicle-compatible standard components are also available for such liquid heat transfer media. Due to the smaller design of the refrigerant circuit this also requires a significantly reduced amount of refrigerant. An interconnection, and in particular a switching function from a heating operation to a cooling operation, can easily be done on the side of

Heat transport medium circulation take place, this being connected to the removal of heat with the gas cooler and / or for dissipating heat to the evaporator. Therefore, there is no need for elaborate valve means in the refrigerant circuit to change the flow of the refrigerant. Rather, this can always flow in a same direction through the refrigerant circuit, regardless of whether the

Air conditioning device is operated in a heating operation or in a cooling operation. Therefore, solenoid valves can be saved in any case for the refrigerant circuit, and it is also only a single expansion valve, namely the expansion device, necessary. In the heat transport medium circuit inexpensive valve devices can be used, since they are only up to about 2 bar and 90 ° C charged. The liquid heat transport medium may have a high heat capacity, in particular a higher heat capacity than the refrigerant, whereby a buffering effect for heat in the heat transport medium circuit is effective, so that switching on and / or off the air conditioning device and in particular the

Refrigerant circuit for vehicle occupants are not directly felt. In particular, the entire functionality of an interconnection of the air conditioning device can take place on the side of the heat transport medium circuit, so that simpler and more favorable components can be used here, which operate at a lower pressure and temperature level. This results in a total cost reduction, an increase in reliability, and a better control quality in connection with the air conditioning device proposed here compared to the prior art.

Ultimately, it is also readily possible to design the cooling circuit modular, in particular with different refrigerants. The heat transport medium circuit may be standardized, regardless of the design of the

Refrigerant circuit.

The term "thermal power" includes both heating power and cooling power, so that thermal power can be supplied to the at least one heat transfer device does not initially say anything about the direction of a heat flow, but rather only that heat between the refrigerant circuit and the

Heat transfer device is promoted, either to the Heat transfer device to supply heat or heat from the

Dissipate heat transfer device.

The terms "gas cooler" and "evaporator" are used herein in a general sense, wherein the gas cooler is in particular a heat sink and the evaporator is a heat source of the refrigerant circuit. The term "condenser" can also be used synonymously with the term "gas cooler". In the refrigerant circuit, the refrigerant preferably passes through during operation

Phase transition, wherein it is present in particular after cooling in the gas cooler or condenser in the liquid or supercritical phase at a higher pressure, wherein it is expanded in the expansion device and at the latest in the evaporator with heat input into a gaseous phase at a lower pressure. In the compressor, the then gaseous refrigerant is recompressed, whereby it reaches a higher temperature level, wherein it is then cooled again in the gas cooler or condenser and preferably liquefied. The operation of such a refrigerant circuit is basically known, so that will not be discussed in detail.

A liquid heat transport medium is in particular a heat transport medium, which is liquid during operation of the heat transport medium cycle, in particular in the entire heat transport medium cycle. Thus, the heat transfer medium does not undergo phase transformation along the heat transfer media cycle. Particularly preferably, the liquid heat transport medium under normal conditions,

especially at 25 ° C and 1013 mbar, liquid. The heat transport medium is particularly preferably water. It is possible that as

Heat transfer medium serving water additives, such as an antifreeze or the like, are added. A water cycle as

Heat transport medium circuit is on the one hand particularly simple and inexpensive to build up, on the other hand, water is preferred as a heat transport medium for safety reasons, as this is safe and environmentally friendly. In addition, water has a very high heat capacity, so that makes the previously described buffer effect in a particularly favorable manner during switching on and / or off.

The fact that the heat transport medium circuit is fluidically and thermally connected to the gas cooler and / or the evaporator means in particular that the

Heat transport medium cycle passes through the gas cooler and / or the evaporator or flows through, wherein the heat transport medium is used in particular in the gas cooler and / or in the evaporator as a heat exchange medium to

For example, remove heat from the refrigerant in the gas cooler and / or supply heat in the evaporator. In this case, in particular in the evaporator and / or in the gas cooler, the refrigerant on the one hand and the heat transport medium on the other hand are in thermal contact with each other.

A heat transfer device is understood to mean, in particular, a device which is set up to release heat in particular to an environment or to take it up from an environment.

According to one embodiment of the invention, it is provided that the refrigerant circuit is free of heat exchange devices with the exception of the gas cooler and the

Evaporator. In particular, the refrigerant circuit has no other

Heat exchangers on, except the gas cooler and the evaporator. This means in particular that the refrigerant circuit has only the evaporator and the gas cooler as heat exchange devices. The refrigerant circuit therefore has, in particular, no heat transfer device for exchanging thermal power with an environment, in particular the interior of a vehicle. With the

Refrigerant cycle, thermal performance is preferred exclusively over the

Heat transfer medium circuit exchangeable.

Alternatively or additionally, the refrigerant circuit is preferably exclusively thermally connected to the heat transfer medium circuit. This means, in particular, that the refrigerant circuit is thermally encapsulated, whereby it only via the

Wärmetransportmedienkreisia on heat can be supplied, whereby only over the

Wärmeransportmedienkreisia on heat from the refrigerant circuit is discharged.

As a result, the refrigerant circuit may be made particularly small, in particular because it is not used directly for the air conditioning of any facilities, in particular a vehicle interior. Rather, this functionality is exclusively mediated via the Wärmeransportmedienkreisiauf.

According to one embodiment of the invention it is provided that the

Wärmeransportmedienkreisiauf, which may also be referred to as a heat transfer medium circulation device, a first, with the gas cooler fluidly and thermally connected partial circuit has. Furthermore, the heat transport medium circuit has a second subcircuit fluidically and thermally connected to the evaporator on. Thus, it is possible to extract heat from the gas cooler on the one hand via different partial circuits and, on the other hand, to supply heat to the evaporator. The first partial circuit and the second partial circuit are different from each other and in particular separable from each other, most preferably separated from each other. It is possible that no exchange of heat transfer medium between the first partial circuit and the second partial circuit is possible. But it is also possible that the two

Subcircuits are at least partially fluidly connected to each other. Furthermore, it is possible for the heat transport medium circuit to have a valve device, via which the subcircuits can be connected to one another or separated from one another.

According to one embodiment of the invention it is provided that the

Heat transport medium circuit has a valve device, via which the

Heat transfer medium optionally a heat exchanger and / or at least one air conditioning device can be fed. The heat exchanger is preferably

set to - depending on the operating condition of the air conditioning device - as

Heat source, especially in the heat pump or heating operation, or as a heat sink, in particular in the cooling mode, to act of the heat transfer medium cycle.

Particularly preferably, the heat exchanger is designed as an outdoor heat exchanger of the vehicle, which can be arranged for example on a vehicle roof, in particular a bus. Here, in the air conditioning device proposed here, the exterior heat exchanger of the vehicle is exclusively of the

Heat transfer medium and not flowed through by refrigerant.

The at least one air conditioning device is preferably as a heating and / or

Cooling device formed, in particular for an interior of the vehicle, and thus preferably serves the interior air conditioning of the vehicle. The heat exchanger on the one hand and the at least one air-conditioning device on the other hand, in particular, represent heat transfer devices of the air-conditioning device.

According to one embodiment of the invention, it is provided that the valve device is set up in order to bring the first partial circuit with the at least one air conditioning device and the second partial circuit with the heat exchanger in fluid communication in a first operating state. This first operating state corresponds to a heating operation of the air conditioning device, wherein the first partial circuit functions as a heating circuit. The heat transport medium removes heat from the refrigerant circuit in the first partial circuit to the gas cooler, wherein these the at least one air conditioning device, in particular for the interior heating of the vehicle, is supplied. At the same time, the heat transport medium can absorb heat in the second partial circuit when flowing through the heat exchanger and feed it to the evaporator of the refrigerant circuit. The refrigerant circuit acts as a heat pump in heating mode.

Alternatively or additionally, it is provided that the valve device is set up to bring the second partial circuit with the at least one air conditioning device and the first partial circuit with the heat exchanger in fluid communication in a second operating state. This second operating state corresponds to a cooling operation. In this case, the heat transport medium in the second subcircuit at

Flowing through the at least one air conditioning device heat, in particular from a vehicle interior, and transports them along the second

Partial circulation to the evaporator of the refrigerant circuit. The heat transport medium in the first partial circuit absorbs heat from the refrigerant circuit as it flows through the gas cooler and transports it to the heat exchanger, where it emits the heat, in particular to the outside air of the vehicle. In this operating state, the air conditioning device functions as a KUmaaniage.

To convert the various operating states requires - as already stated - no change in the flow of the refrigerant in the refrigerant circuit.

Rather, it only requires a switching of the heat transfer medium circuit associated valve device.

The valve device is preferably set up to different

Air conditioning devices of a plurality of air conditioning devices with the first or the second partial circuit to connect. That way you can

in particular locally different air conditioning device controlled and thus a heat distribution in the vehicle can be influenced.

The object is also achieved by providing a vehicle having an air conditioning device according to one of the previously described embodiments. The vehicle further comprises at least one heat transfer device, wherein the at least one heat transfer device mediated via the

Heat transfer medium circuit is thermally connected to the refrigerant circuit. In connection with the vehicle, in particular, the advantages that have already been explained in connection with the air conditioning device. Preferably, the at least one heat transfer device of the vehicle is thermally connected exclusively via the heat transport medium circuit with the refrigerant circuit. The refrigerant circuit is thus not in particular for direct air conditioning of the

Vehicle used, but only mediated over the

Heat transport medium circuit.

According to one embodiment of the invention, it is provided that the at least one heat transfer device is selected from a group comprising an exterior heat exchanger of the vehicle, a vehicle interior air conditioning device, a driver's seat air conditioning device, a vehicle floor air conditioning device, and a vehicle roof air conditioning device. Particularly preferably, the vehicle has at least one of each of the heat transfer devices mentioned here. It is also possible that the vehicle has a

A plurality of at least one of the heat transfer device mentioned here, for example, a plurality of vehicle floor air conditioning devices and / or a plurality of vehicle roof air conditioning devices. The

Valve device is preferably arranged for particular variable and different control of the various heat transfer devices, and it is particularly adapted to the distribution of thermal power to the

various heat transfer devices. The outdoor heat exchanger is

in particular the heat exchanger of the heat transport medium circuit.

According to one embodiment of the invention, it is provided that the first subcircuit is fluidly connected to at least one driver's seat air conditioning device, at least one vehicle floor air conditioning device and at least one vehicle roof air conditioning device. In this way it is particularly possible to heat in the heating operation the driver's seat, the vehicle floor and the vehicle roof - preferably controlled by the valve device as needed. It is possible that the first sub-circuit is connected to a plurality of vehicle floor air conditioning devices and / or a plurality of vehicle roof air conditioning devices. A heating of both the vehicle roof and the vehicle floor is useful because so a particularly favorable

Temperature stratification in the vehicle may result. This represents a further advantage compared to the prior art, because with a direct use of the

Refrigerant circuit for vehicle air conditioning - depending on the arrangement of

Refrigerant cycle - only the vehicle roof or only the vehicle floor with thermal power can be acted upon, otherwise it is too large and ultimately would also need to expensive piping for the refrigerant circuit. In contrast, the heat transfer medium circuit can be readily designed large enough to apply to both the vehicle roof and the vehicle floor. In particular, the heating of the vehicle floor is useful, since the hot air generated during heating rises to the top. In this case, a convection heating effect can be effected. Alternatively or additionally, the vehicle heating can be assisted by a blower, whereby in particular the effect of the convection heating effect can be improved.

It is also possible that the first partial circuit is not connected to a vehicle roof air conditioning device, in particular only with a driver's seat air conditioning device and at least one vehicle floor air conditioning device. A heating of the vehicle floor can in principle be sufficient for heating the vehicle interior.

Alternatively or additionally, it is preferably provided that the second partial circuit is fluidly connected to at least one driver's seat air conditioning device and at least one vehicle roof air conditioning device. In this way, the driver's seat and the vehicle roof can be cooled via the second partial circuit.

Preferably, the second partial circuit is not fluidly connected to a vehicle floor air conditioning device. Such a fluid connection can

In particular, also be saved in terms of cost and efficiency as well as physical reasons, since the formed on the vehicle floor, cold air would remain there, so they would need to be distributed with additional fan power to achieve a cooling effect in the vehicle. This, however, would be too

unpleasant drafts, especially in the footer of vehicle occupants lead.

The driver's seat air conditioning apparatus preferably includes at least one

Cooling heat exchanger and at least one heating heat exchanger. In this case, the heating heat exchanger is preferably fluid-connected to the first partial circuit, wherein the

Cooling heat exchanger is fluidly connected to the second partial circuit. Further, the driver's seat air conditioning apparatus may include a fan and louvers for regulating a supply of fresh air and air distribution to vents on a window, particularly a windshield of the vehicle, to the feet of a driver of the vehicle and, if present, a man's vent in the upper body region of the driver. According to one embodiment of the invention, it is provided that the first partial circuit is connected to a Zuheizvorrichtung. This is in particular an additional heater that can be operated with a fuel, such as diesel, gas or the like. In particular, the auxiliary heating device can be activated or deactivated independently of the refrigerant circuit. It may also serve, in particular, to provide additional and / or faster heating power when the

Refrigerant cycle, for example, at a start of the vehicle in winter, does not heat quickly enough or only generates too low heat output.

The first partial circuit is preferably connected to the auxiliary heating device fluidically and / or thermally, in particular fluidically and thermally.

On a Zuheizvorrichtung but can preferably be dispensed with, since the

Performance potential of the refrigerant circuit, in particular as a heat pump, can be fully utilized. In particular, this does not have to be regulated back due to otherwise unfavorable temperature stratification.

According to one embodiment of the invention, it is provided that the vehicle is designed as a bus, in particular as a bus. The vehicle serves the

Passenger transport, in particular a larger number of persons, in particular more than five or more than seven persons as intended. In particular, the vehicle may be designed as a city bus or as a long-distance bus, in particular as a coach.

The use of the air conditioning device described here is by no means limited to this type of vehicle, but rather the one proposed here

Air conditioning device can be used for each vehicle type. The vehicle may therefore also be a passenger car, a truck or a commercial vehicle of another type, or a ship, a railway vehicle, an aircraft or the like.

It turns out that the air conditioning device proposed here is also very favorable for a defrosting of the outdoor heat exchanger (heat exchanger for exchanging heat or cold with the vehicle environment) of the vehicle, because in a simple way waste heat from components of the vehicle, such as power electronics, in the heat exchanger, in particular in the outdoor heat exchanger, can be fed, said heat from there over the Heat transport medium circuit can first be supplied to the refrigerant circuit and then finally provided for defrosting air conditioning device.

The invention will be explained in more detail below with reference to the drawing. The single figure shows a schematic representation of an embodiment of a vehicle with an embodiment of an air conditioning device.

The single figure shows a schematic representation of a vehicle 1, which is preferably designed as a bus, and which has an air conditioning device 3.

The air conditioning device 3 has a refrigerant circuit 5, along which a refrigerant can be conveyed. The refrigerant circuit 5 has a compressor 7, a

Gas cooler 9, an expansion device 11 and an evaporator 3 on. In the refrigerant circuit 5, the refrigerant is compressed by the compressor 7, then supplied to the gas cooler 9, in which it is cooled, whereby the compressed and cooled refrigerant is expanded in the expansion device 11, after which it flows through the evaporator 13, in which it absorbs heat which, in turn, leads to the

Compressor 7 flows back.

In this way, the gas cooler 9 is a heat sink of the refrigerant circuit 5, wherein the evaporator 13 is a heat source of the refrigerant circuit 5.

The air conditioning device 3 also has a heat transfer medium circuit 15, in which a liquid heat transport medium can be conveyed. Of the

Heat transport medium circuit 15 is fluidically and thermally connected to the gas cooler and / or the evaporator - here both with the gas cooler 9 and with the evaporator 13, that thermal power of the refrigerant circuit 5 via the heat transport medium circuit 15 to at least one heat transfer device 17 is conveyed.

The refrigerant circuit 5 has here except the gas cooler 9 and the evaporator 7 no further heat exchange device. In particular, the refrigerant circuit 5 is thermally connected only to the heat transport medium circuit 15. The refrigerant circuit 5 is thus formed in particular encapsulated. He can build in this way very small and requires only a small amount of refrigerant. An interconnection in particular of the entire functionality of the air conditioning device 3 can in advantageously take place on the part of the heat transport medium circuit 15, which is easier and in particular also less expensive.

The heat transport medium circuit 15, the extent in particular a

Heat transfer medium circuit device, has a first partial circuit 19 which is fluidly and thermally connected to the gas cooler 9. It also has a second partial circuit 21, which is thermally and fluidically connected to the evaporator 13. The partial circuits 19, 21 are preferably separable from each other, particularly preferably by means of a valve device, in particular they are separated from each other.

Furthermore, the heat transport medium circuit 15 has a valve device 23 having a plurality of valves, via which the heat transport medium can optionally be fed to a heat exchanger 25, in particular an exterior heat exchanger 27 of the vehicle 1, and / or at least one air conditioning device 29 as a heat transfer device 17.

The valve device 23 is in particular configured to be in a first

Operating state, in particular a heating operation, the first partial circuit 19 with the at least one air conditioning device 29 and the second partial circuit 21 to connect to the heat exchanger 25, and further in a second operating state, in particular a cooling operation, the second partial circuit 21 with the at least one air conditioning device 29 and bring the first partial circuit 19 in fluid communication with the heat exchanger 25.

The at least one heat transfer device 17 is otherwise preferably selected from a group consisting of the outdoor heat exchanger 27, a

A vehicle interior air conditioning apparatus, a driver's seat air conditioning apparatus 31, a vehicle floor air conditioning apparatus 33, and a vehicle roof air conditioning apparatus 35.

Here, the first sub-circuit 19 is fluidly connected to the driver's seat air-conditioning device 31, the vehicle-floor air-conditioning device 33, and the vehicle-roof air-conditioning device 35. In this case, the driver's seat air conditioning device 31 preferably has exactly one heating heat exchanger, wherein the vehicle roof air conditioning device 35 preferably has a plurality, in particular two heating heat exchangers, wherein the vehicle floor air conditioning device 33 preferably has a plurality, in particular a larger number, of heating heat exchangers than the vehicle roof air-conditioning device 35. The heating heat exchangers are in each case fluid-connected to the first partial circuit 19.

The second sub-circuit 21 is here fluidly connected to the driver's seat air conditioning device 31 and to the vehicle roof air-conditioning device 35. In this case, the driver's seat air conditioning device 31 preferably has exactly one cooling heat exchanger, wherein the vehicle roof air conditioning device 35 preferably has a plurality of cooling heat exchangers, in particular two cooling heat exchangers. The cooling heat exchangers are in each case fluid-connected to the second partial circuit 21.

The vehicle-floor air-conditioning device 33 preferably has none

Cooling heat exchanger and is not connected to the second partial circuit 21.

By means of the valve device 23, the inflow to the individual heating and / or cooling heat exchangers of the individual air conditioning devices 29 is preferably controllable.

It can also be seen that the first partial circuit 19 is preferably connected to an auxiliary heater 37 - in particular fluidically and thermally, wherein the auxiliary heater 37 is preferably activatable and deactivatable independently of the refrigerant circuit 5, and wherein the auxiliary heater 37 is preferably configured to additionally or alternatively to the refrigerant circuit 5, to introduce heating power into the first partial circuit 19.

It can also be seen that preferably both the first partial circuit 19 and the second partial circuit 21 each have a conveyor 39, 41, wherein the

Conveyors 39, 41 are arranged to promote the heat transport medium along the sub-circuits 19, 21, wherein the conveyors 39, 41 are preferably designed as pumps, in particular as water pumps.

As the heat transport medium, water is preferably used in the heat transport medium circuit 15.

The operation of the air conditioning device 3 is in the various

Operating conditions in particular the following: In the first operating state, that is, in the heating mode, the

Air conditioning devices 29 via the first partial circuit 19 heat supplied from the gas cooler 9, wherein the first partial circuit 19 is preferably not with the

Outdoor heat exchanger 27 is fluidly connected. The second partial circuit 21 is fluidly connected to the outdoor heat exchanger 27, so that heat from the environment can be taken up into the second partial circuit 21 and fed to the evaporator 13 of the refrigerant circuit 5. The second partial circuit 21 is preferably not connected to the air conditioning devices 29.

In the second operating state, thus in the cooling mode, the second is preferred

Partial circuit 21 not with the outdoor heat exchanger 27, but with the

Air conditioning devices 29 connected so that this heat can be withdrawn and the evaporator 13 of the refrigerant circuit 5 can be supplied. The first partial circuit 19 is preferably not with the air conditioning devices 29, but with the

Outdoor heat exchanger 27 is connected, so that waste heat of the refrigerant circuit 5 can be supplied from the gas cooler 9 to the outdoor heat exchanger 27.

Intermediate states between the first operating state and the second operating state are preferably also possible, wherein the subcircuits 19, 21 may, for example, at the same time be connected to at least one of the air conditioning devices 29 in order to set a variable temperature or temperature distribution in the interior of the vehicle 1.

Overall, it turns out that the air-conditioning device 3 proposed here can be designed inexpensively, simply and with a high level of safety, in particular because the refrigerant circuit 5 can be made very small and preferably encapsulated.

Claims

claims

1. Air conditioning device (3) for a vehicle (1), with

- A refrigerant circuit (5) along which a refrigerant is conveyed, wherein

- The refrigerant circuit (5) has a compressor (7), a gas cooler (9), an expansion device (11) and an evaporator (13), and with

- A heat transfer medium circuit (15), in which a liquid

Heat transport medium is conveyed,

characterized in that

- The heat transfer medium circuit (15) with the gas cooler (9) and / or with the evaporator (13) of the refrigerant circuit (5) is fluidly and thermally connected such that thermal performance of the refrigerant circuit (5) via the heat transfer medium circuit (15) to at least one Heat transfer device (17) is conveyed.

2. Air conditioning device (3) according to claim 1, characterized in that the refrigerant circuit (5)

- Has no other heat exchange device except the gas cooler (9) and the evaporator (13), and / or

- Is thermally connected only to the heat transfer medium circuit (15).

3. Air conditioning device (3) according to one of the preceding claims, characterized in that the heat transfer medium circuit (15) has a first, with the gas cooler (9) fluidically and thermally connected partial circuit (19) and a second, with the evaporator (13) fluidly and thermally connected

Partial circuit (21).

4. Air conditioning device (3) according to one of the preceding claims, characterized in that the heat transfer medium circuit (15) a

Valve means (23) via which the heat transfer medium optionally a heat exchanger (25) and / or at least one air conditioning device (29) can be fed.

5. Air conditioning device (3) according to one of the preceding claims, characterized in that the valve device (23) is arranged to

a) in a first operating state, the first partial circuit (19) with the

at least one air conditioning device (29) and the second

Partial circuit (21) with the heat exchanger (25) in fluid communication, and / or

b) in a second operating state to bring the second partial circuit (21) with the at least one air conditioning device (29) and the first partial circuit (19) in fluid communication with the heat exchanger (25).

6. Vehicle (1), with an air conditioning device (3) according to one of claims 1 to 5, and with at least one heat transfer device (17), wherein the at least one heat transfer device (17) mediated over the

Heat transfer medium circuit (15) is thermally connected to the refrigerant circuit (5).

7. Vehicle (1) according to claim 6, characterized in that the at least one heat transfer device (17) is selected from a group consisting of an outdoor heat exchanger (27), a vehicle interior air conditioning device, a driver's seat air conditioning device (31), a vehicle Floor air conditioning device (33), and a vehicle roof air conditioning device (35).

8. Vehicle (1) according to any one of claims 6 and 7, characterized in that the first partial circuit (19) with at least one driver's seat An air conditioning device (31) is fluidly connected to at least one vehicle floor air conditioning device (33), and to at least one vehicle roof air conditioning device (35), and / or the second subcycle (21) is connected to at least one driver station air conditioning device (31 ) and fluidly connected to at least one vehicle roof air conditioning device (35).

9. Vehicle (1) according to one of claims 6 to 8, characterized in that the first partial circuit (19) is connected to a Zuheizvorrichtung (37).

10. Vehicle (1) according to any one of claims 6 to 9, characterized in that the vehicle (1) is designed as a bus.